Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
10/03/2024, 06:11
Behavioral task
behavioral1
Sample
2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe
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Size
127KB
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MD5
97a7ac797299eb5901180bd3d81d5320
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SHA1
9648d1761937e3a225bc0ffde8b36d673ae96c23
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SHA256
011019323f76a12aba0f0fdd24069764c784a87efb6482f9d00c880f6a2ba1ad
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SHA512
4a1aa0ab88ac0bb6ec0eb9ee743da5f50d9bbbdde5d72fcec560e841a347e584439a6d9218062f8cb8ec76da4cf2e53c1aebe9c8e65bd43a300bf90f07ea147f
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eIu:AnBdOOtEvwDpj6zH
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/2280-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023149-13.dat CryptoLocker_rule2 behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2280-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2076-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/2280-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000c000000023149-13.dat CryptoLocker_set1 behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2280-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/2076-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/2280-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000c000000023149-13.dat UPX behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/2280-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/2076-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2076 asih.exe -
resource yara_rule behavioral2/memory/2280-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000c000000023149-13.dat upx behavioral2/memory/2076-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/2280-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/2076-27-0x0000000000500000-0x000000000050F000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2280 wrote to memory of 2076 2280 2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe 85 PID 2280 wrote to memory of 2076 2280 2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe 85 PID 2280 wrote to memory of 2076 2280 2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-10_97a7ac797299eb5901180bd3d81d5320_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2280 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2076
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
127KB
MD57f64f8fef9e135607cb4b1b261ab1758
SHA13176ca74c86364b918db6966a8bc2800679755dd
SHA2569a5b13433e74f6a7f889b3090a837e5bc3b8b82160f6d2bb3e0bec23eeb96659
SHA51230a49c19ce3353eb6dadd1974c391b1549b144044400e1bbcdb7cc0b1fb8581c8a33baec41018953da744656f1c8f330b39c07f058aa29287c2fe2a7cba1f1dc